Creates the union of two rectangles

#include <WinAPIGdi.au3>

_WinAPI_UnionRect ( $tRECT1, $tRECT2 )

$tRECT1 | $tagRECT structure that contains the first source rectangle. |

$tRECT2 | $tagRECT structure that contains the second source rectangle. |

Success: | $tagRECT structure that contains the union of the $tRECT1 and $tRECT2 rectangles. |

Failure: | Sets the @error flag to non-zero. |

The union is the smallest rectangle that contains both source rectangles. The system ignores the

dimensions of an empty rectangle that is, a rectangle in which all coordinates are set to zero, so that

it has no height or no width.

Search UnionRect in MSDN Library.